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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83132完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳凱風 | zh_TW |
| dc.contributor.advisor | Kai-Feng Chen | en |
| dc.contributor.author | 陳溥生 | zh_TW |
| dc.contributor.author | Pu-Sheng Chen | en |
| dc.date.accessioned | 2023-01-09T06:31:19Z | - |
| dc.date.available | 2023-11-09 | - |
| dc.date.copyright | 2023-01-06 | - |
| dc.date.issued | 2022 | - |
| dc.date.submitted | 2022-12-19 | - |
| dc.identifier.citation | HEPData record for this analysis. 2022. DOI: 10.17182/hepdata.114781.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83132 | - |
| dc.description.abstract | 此論文透過頂夸克對的半輕子衰變態尋找電荷宇稱破壞。此測量使用從2016年到2018年，藉由緊湊緲子線圈收集的質心能量十三兆電子伏特的質子對撞事件，其總和亮度達到一百三十七逆飛靶。此分析方法使用線性獨立的終態粒子的四維動量所建立的可觀測量來測量可能的宇稱破壞。藉由觀測到的不對稱量所測量到的無因次色電偶極矩量為0.04±0.10(stat)±0.07(syst)，此結果顯示沒有電荷宇稱破壞的徵兆，並吻合標準模型的預測。 | zh_TW |
| dc.description.abstract | Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at 13TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 inverse fb. Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04±0.10(stat)±0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2023-01-09T06:31:19Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2023-01-09T06:31:19Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員審定書 III
致謝 V 摘要 VII Abstract IX 1 Introduction 1 2 Experimental Apparatus 3 2.1 Large hadron collider 3 2.1.1 Proton injection and operational cycle 4 2.1.2 Machine design 4 2.1.3 Luminosity and pileup 6 2.2 Compact muon solenoid 9 2.2.1 Coordinate system 9 2.2.2 Trackingsystem 11 2.2.3 Electromagnetic calorimeter(ECAL) 14 2.2.4 Hadronic calorimeter(HCAL) 16 2.2.5 Magnet configuration 17 2.2.6 Muon detectors 18 2.3 Trigger 20 2.3.1 Level1 trigger 20 2.3.2 High level trigger 22 3 Physical object reconstruction 24 3.1 Particle flow ingredients 25 3.1.1 Track 25 3.1.2 Vertex 26 3.1.3 Calorimeter clustering 28 3.2 Muon 28 3.2.1 Muon reconstruction 28 3.2.2 Muon identification and isolation 29 3.3 Electron 31 3.3.1 Electron reconstruction 31 3.3.2 Electron identification and isolation 33 3.4 Jet 34 3.4.1 Jet reconstruction 36 3.4.2 Jet corrections 36 3.4.3 Jet identification 37 3.4.4 Jet flavor tagging 37 4 Data and simulated samples 53 4.1 Data samples 41 4.2 Simulated samples 41 4.3 Corrections to simulation 46 4.3.1 Jet energy smearing 47 4.3.2 Efficiency scale factor 47 4.3.3 Pileup re-weighting 48 5 Event selection 50 5.1 Trigger 50 5.2 Physical object selection 50 6 Asymmetries extraction 60 6.1 Fitting procedure 60 6.2 Experimental sensitivity 71 7 Systematic uncertainties 74 7.1 Detector and reconstruction effects 74 7.1.1 Background-enriched method 74 7.1.2 Event-mixing method 75 7.1.3 Asymmetries in simulated samples 75 7.2 Other experimental and theoretical systematic uncertainties 76 7.2.1 Other experimental systematic uncertainties 76 7.2.2 Theoretical systematic uncertainties 86 8 Results 89 8.1 Asymmetry measurements 89 8.2 Constraint on the dimensionless CEDM 89 9 Conclusion 94 A Electron trigger study 95 A.1 Event and sample selection 95 A.2 Results of tag and probe 95 A.3 Systematic uncertainty 95 B Dilution factors 99 Bibliography 102 | - |
| dc.language.iso | en | - |
| dc.subject | 緊湊緲子線圈 | zh_TW |
| dc.subject | 大型強子對撞機 | zh_TW |
| dc.subject | 電荷宇稱破壞 | zh_TW |
| dc.subject | 頂夸克對 | zh_TW |
| dc.subject | 標準模型 | zh_TW |
| dc.subject | ttbar | en |
| dc.subject | LHC | en |
| dc.subject | CMS | en |
| dc.subject | Standard model | en |
| dc.subject | CP violation | en |
| dc.title | 於緊湊緲子線圈質心能量十三兆電子伏特透過頂夸克對的半輕子衰變態尋找電荷宇稱破壞 | zh_TW |
| dc.title | Search for CP violation using top quark-antiquark events in the lepton+jets channel in pp collisions with √s = 13 TeV at CMS | en |
| dc.title.alternative | Search for CP violation using top quark-antiquark events in the lepton+jets channel in pp collisions with √s = 13 TeV at CMS | - |
| dc.type | Thesis | - |
| dc.date.schoolyear | 111-1 | - |
| dc.description.degree | 博士 | - |
| dc.contributor.oralexamcommittee | 呂榮祥;郭家銘;裴斯達;張寶棣;黃宇廷 | zh_TW |
| dc.contributor.oralexamcommittee | Rong-Shyang Lu;Chia-Ming Kuo;Stathes Paganis;Pao-Ti Chang;Yu-Tin Huang | en |
| dc.subject.keyword | 大型強子對撞機,緊湊緲子線圈,標準模型,電荷宇稱破壞,頂夸克對, | zh_TW |
| dc.subject.keyword | LHC,CMS,Standard model,CP violation,ttbar, | en |
| dc.relation.page | 107 | - |
| dc.identifier.doi | 10.6342/NTU202210032 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2022-12-21 | - |
| dc.contributor.author-college | 理學院 | - |
| dc.contributor.author-dept | 物理學系 | - |
| 顯示於系所單位： | 物理學系 | |
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